Dual band gas burner with crossover burner grid



Nov. 13, 1951 w. B. ENSIGN ETAL 2,575,101

DUAL BAND GAS BURNER WITH CROSSOVER BURNER GRID Filed- Feb. 19, 1948 INV EN TOR! WLLIAM B. ENSIGN O'r'ro WILDERMAN.

able pipe for supplying a combustion mixture of gas and air.

The casting 16 includes a main hollow cylindrical portion 22, closed atopposite ends by walls 23 and 24. The wall 23 is provided with thetapped aperture I1 while the opposite wall 24 has .a tapped hole 25closable by a matchingly threaded plug not shown.

Exteriorly offset from and extended along oppo site sides of portion 22of the casting I9 are a pair of like horizontal ribs 26, these extendedfrom close to one end of said casting, to a short distance from theother end thereof. Through said ribs, and extending almost from end toend thereof, are cut slots 21, within which are band or ribbonassemblies pursuant to the patents aforesaid. These assemblies, one ofwhich is seen at 28 in Fig. 2, are made of corrosion-proof andnon-oxydizing metal ribbons. Such'assemblies are secured in thefslots 21in any desired way; for instance, by lines of rivets as indicated at 29.

Extending laterally across the top of the casting 6, at a pointintermediate its ends, is an external arcuate rib which at its oppositebottom portions joins the upper portions of the side ribs 26. Thisarcuate rib is divided into two like rib halves 35 by a slot 36; whichslot, as shown best in Fig. 2 connects with the two side slots 21.

. All the foregoing is illustrative of the subject matter of applicantssaid patent application filed herewith.

Referring to the invention disclosed and claimed herein, between the tworib halves 35 is mounted a burner assembly 31 pursuant to the presentinvention, for providing burner-orifices for the connecting cross-over.

The burner assembly 31 is of arcuate formation, and is here shown ascomprising two outer plane band or ribbon elements 38 and 39 and twoinner corrugated band or ribbon elements 40 and 4|.

Theelements 40 and 4| are semi-annular and have their corrugations, asillustrated, extended along lines radial to such annulus. These elementsare sandwiched in between the elements 38 and 39, which latter are alsosemi-annular. The bottom curvilinear edges of all said elements arealigned, to partially nest the crest portions of the corrugations of oneof the elements 40 and 4| in the trough portions of the corrugations ofthe other of said elements 40 and 4|, thereby to provide inner smallerorifices 42 and outer larger orifices 43 within the assembly 31.

In such assembly the plane elements 38 and 39, while semi-annular likethe elements 40 and 4| as just stated, are of greater width than theelements 49 and 4|, so that when these parts are arranged as just abovedescribed, an arcuately extending compartment or channel 44, to providea gas expansion and distribution space, is established in ofisetrelation from the outer ends of said orifices between the elements 4|]and 4|.

Any suitable means may be employed to establish the assembly 31 bycoupling the elements 38 4I to clamp the elements 40 and 4| between theelements 38 and 39; such clamping coupling being preferably done beforethe device 31 is mounted in the slot 36.

For instance, the four elements 38-4| may be provided with matchingapertures 45 as shown in-Fig. 3, for connecting said elements 38- -4I asin Fig. 4 by applying rivets through said apertures, such rivetscountersunk in the outer ends ofthe apertures through the. elements 39and 39 so as to have the rivet ends flush with the outer surfaces ofsaid elements 38 and 39.

Another way of establishing the device 31 is, with the parts tightlysqueezed together as in Fig. 4, to apply silver solder at both lowerends of all the elements, as at the areas marked 46 in Fig. 3.

The width of the slot 36 is such that when the assembly 31 is forceddown all the way into said slot, the upper portions of the outerelements 38 and 39 will close in to establish the required intimacy ofcontact between said elements 38 and 39 and the inner elements and 4|and between the corrugations of the latter.

Also, silver solder may be used as just described, and the apertures mayalso be present, with the latter used, in connection with matchingapertures through the rib halves 35, for anchoring the assembly 31 inplace in the slot 36, by readily removable L-shaped pins applied at theapertures through said assembly and said rib halves.

A now preferred way of mounting the assembly 31 in the slot 36,-however, is to shape one of the two outer plane elements 39 and 39 sothat the same includes tabs 41 to be bent over for projectionperpendicularly from one side of the assembly 31, so that such tabs attheir underlying faces will engage the top of a half rib 35 when theassembly 31 is properly positioned in the slot 36. As here shown, bothof the elements 38 and 39 are provided with tabs 41. Whether one or bothof the elements 38 and 39 carry said tabs. at least one of said elementswill preferably be provided with at least two of the tabs, these locatedat suitably spaced points in the direction of curvilinear extension ofthe assembly 31 to insure that when both the last mentioned tabs engagethe adjacent rib half 35 the assembly will be properly centered in theslot 36.

Adjacent a pad 48 at the top and near one end of the casting H5 is anelectrical ignition means including a sparking electrode 49 projectedfrom a casing 59 of insulating material, such casing held ina mountingclip 5| suitably attached, as by a screw 52, to the main cylindricalportion 22 of the casting.

The burner may be ignited from any desired point along the entirety ofthe H-shaped array of burner orifices. When, as is preferred, the pointof ignition is along one of the main flame spaces at a slot 21, theflame instantly travels all along such space, and, instantly alsoflashes along the cross-over line of burner-orifices at the device 31,and then instantly all along the other main flame space at the otherslot 21.

The ribs 35 forming the cross-over is shown at substantially the centerof the burner and extended at right angles thereto; however, it ispointed out that the ribs may be formed at any point intermediate thelength of the burner and at any desired angle. Furthermore, while theintermediate ribbons of the ribbon assemblies 28 and 31 are illustratedas being corrugated, this is by way of illustration, as they may takeany desired shape which provides spaces between the adjacent faces.

While we have illustrated and described the preferred embodiment of ourinvention, it is to be understood that 'we do not limit ourselves to theprecise constructions herein disclosed and the right is reserved to allchanges and modifications coming within the scope of the invention asdefined in the appended claims.

Having thus described our invention, what we claim as newpanddesiretosecure by United states Letters Patent 18: i i. l

l. A gas burner comprising aho'llow feasting for connection to a sourceof combustible gas and formed along diametrically opposite sides withparallel ribs having elongated slots, burner-as: sembliesinsaid slotsfor discharging the combustible gas from the casting in a burnablesprayga burner assembly for, igniting the gas discharging, from one sidewhen the, gas discharging from the other side has been ignited saidburner assembly comprising an-arcuate rib formed across thfiltOporthecasting and extended between the tops ofs'the'parallel ribs,saidadrchate :rib bein divided into a pair of adjacent rib portions byan intermediate slot, said slot communicating with the interior of thecasting and with the slots of the parallel ribs, and an arcuate burnerassembly mounted in position between the adjacent faces of said adjacentrib portions to have the combustible gas discharge therefrom in aburnable spray to be ignited by the burning gas along the said otherside of the casting to carry the flame to the said one side thereof andignite the combustible gas discharging from that said one side, saidarcuate burner assembly comprising a pair of adjacent inner corrugatedarcuate ribbon elements, a flat outer arcuate ribbon element located oneither side of said inner ribbon elements and concentric therewith,means securing said ribbon elements together as a unit to be slippedinto position in the slot between said arcuate rib portions, and tabsintegrally formed on the outer peripheries of said outer arcuate ribbonelements adjacent their ends, said tabs being bent to extend outward atright angles to said outer arcuate ribbon elements to engage the outerperipheries of said arcuate rib portions securing said arcuate burnerassembly against lateral shifting relative to said arcuate rib.

2. A gas burner comprising a hollow casting for connection to a sourceof combustible gas and formed along diametrically opposite sides withparallel ribs having elongated slots, burner assemblies mounted in saidslots for discharging the combustible gas from the casting in a burnablespray, a cross-over for igniting the gas discharging from one side whenthe gas discharging from the other side has been ignited, said crossovercomprising an arcuate rib formed across the top of the casting andextended between the tops of the parallel ribs, said arcuate rib beingdivided into a pair of adjacent rib portions by an intermediate slot,said slot communicating with the interior of the casting and with theslots of the parallel ribs, and an arcuate burner assembly mounted inposition between the adjacent faces of said adjacent rib portions tohave the combustible gas discharge therefrom in a burnable spray to beignited by the burning gas along the said other side of the casting tocarry the flame to the said one side thereof and ignite the combustiblegas discharging from that said one side, said arcuate burner asemblycomprising a pair of adjacent inner corrugated arcuate ribbon elements,a flat outer arcuate ribbon element located on either side of said innerribbon elements and concentric therewith, means securing said ribbonelements together as a unit to be slipped into position in the slotbetween said arcuate rib portions, and tabs integrally formed on theouter peripheries of said outer arcuate ribbon elements adjacent theirends, said tabs being bent to extend outward at right angles to saidouter arcuate ribbon elements to engage the outer peripheries ofsaidirarcilate ribirport-ionsssecur ng:isaia@arcuatsburneriassemblmaeainst lateralshiitf .a relative is d. arcuatenb said scuringmeans iorrsaid 'ribbonz lements comprising; spotweldsepplied;topaced .n intsonsaid ribbon, elements.

.1 3.145 :aas ,gbnrnerzcomprisine. Laghollow casting ior;; c,enne tion:to :a source of combustiblezzeas and formed :along diametricallyopPositesidsfi with-p r llel ribs having elongated .slots..;burnerassembliesmounted in saidslots fordischarging thegcombustible gas;fromthercasting .in ma burnable spray, a crosseover for :ignitingthegasz-discharginafrom. oneside when the gas dischargingfromntheaothenside:has :;been ignited, said crossover comprising anarcuate rib formed across the top of the casting and extended betweenthe tops of the parallel ribs, said arcuate rib being divided into apair of adjacent rib portions by an intermediate slot, said slotcommunicating with the interior of the casting and with the slots of theparallel ribs, and an arcuate burner assembly mounted in positionbetween the adjacent faces of said adjacent rib portions to have thecombustible gas discharge therefrom in a burnable spray to be ignited bythe burning gas along the said other side of the casting to carry theflame to the said one side thereof and ignite the combustible gasdischarging from that said one side, said arcuate burner assemblycomprising a pair of adjacent inner corrugated arcuate ribbon elements,a flat outer arcuate ribbon element located on either side of said innerribbon elements and concentric therewith, means securme said ribbonelements together as a unit to be slipped into position in the slotbetween said arcuate rib portions, and tabs integrally formed on theouter peripheries of said outer arcuate ribbon elements adjacent theirends, said tabs being bent to extend outward at right angles to saidouter arcuate ribbon elements to engage the outer peripheries of saidarcuate rib portions securing said arcuate burner assembly againstlateral shifting relative to said arcuate rib, said arcuate burnerassembly being of a length to have its ends rest directly on the burnerassemblies of the parallel ribs providing a continuity of dischargeports.

4. A gas burner comprising a hollow casting for connection to a sourceof combustible gas and formed along diametrically opposite sides withparallel ribs having elongated slots, burner assemblies mounted in saidslots for discharging the combustible gas from the casting in a burnablespray, a cross-over for igniting the gas discharging from one side whenthe gas discharging from the other side has been ignited, said crossovercomprising an arcuate rib formed across the top of the casting andextended between the tops'of the parallel ribs, said arcuate rib beingdivided into a pair of adjacent rib portions by an intermediate slot,said slot communicating with the interior of the casting and with theslots of the parallel ribs, and an arcuate burner assembly mounted inposition between the adjacent faces of said adjacent rib portions tohave the combustible gas discharge therefrom in a burnable spray to beignited by the burning gas along the said other side of the casting tocarry the flame to the said one side thereof and ignite the combustiblegas discharging from that said one side, said arcuate burnerassemblycomprising a pair of adjacent inner corrugated arcuate ribbon elements,a flat outer arcuate ribbon element located on either side of said innerribbon elements and concentric therewith, means secur- 1: ing saidribbon elements together as '8- unit I'D I 4 REFERENCES CITED be Shppedmto posltlon in the slot between said The following references are ofrecord in the arcuate rib portions, and tabs integrally formed mepatent. on the outer peripheries of said outer arcuate ribbon elementsadjacent their ends, said tabs 5 UNITED STATES PAIENIS being bent toextend outward at right angles to Number Name Date said outer arcuateribbon elements to engage 832,879 Roy Oct. 9, 1906 theouter peripheriesof said arcuate rib por- 1,571,636 Nieberding Feb. 2, 1926 tionssecuring said arcuate burner assembly 2,210,069 Ensign Aug. 6, 1940against lateral shifting relative to said arcuate 10 2,235,635 HermanMar. 18, 1944 rib, said tabs being secured to the outer periph-2.3481011 Koppel May 2, 1944 eries of said 'arcuate rib portions.2,42852'71 Ensign et a1. Sept. 30, 1947 -WILLIAM B. ENSIGN. 2,4433101Flynn June 8, 1948 OTTO WILDERM'ANN. 2,491.;430 Tullis Dec. 13, 1949

